Fig. 3
From: Multi-modal tomography to assess dechlorination treatments of iron-based archaeological artifacts
Tomography images obtained before and after treatment of nail A. While Nails B and C show clear difference between images before and after treatment, none significant are observed on the Nail A which was left untreated. This confirms that the changes observed in Nail B and C are caused by the treatment. a Neutron tomography: before treatment, b Neutron tomography: after treatment